HP MU09 Long Life Notebook Battery

HP MU09 Long Life Notebook Battery

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UPC: 884962734155   Part: WD549AA#ABB


HP is dedicated to providing you with innovative power solutions to increase your notebook's entertainment and productivity value while reducing your total cost of ownership. The HP Long Life Battery has up to a three year life span – backed by the industry’s first three-year limited warranty. HP is committed to the environment and reducing battery waste. Fewer batteries are used over the life of the notebook with HP Long Life Batteries making this a smart choice for you and the environment.


  • Lower Total Cost of Ownership: One battery has an up to three year cycle lifespan, reducing your overall battery cost since you purchase fewer batteries over the life of the notebook.
  • Flexible Solutions: With up to three years of warranted performance, you can enjoy the entertainment and productivity features of your notebook for longer then with standard solutions.
  • Environment: HP is committed to protecting the environment and we design our products with that in mind. New technology reduces overall battery waste by requiring fewer batteries to be used over the life of the notebook. HP gives you the option to benefit not only yourself but the environment as well.
  • Intelligent Construction: An insulating safety wrap is used to enclose the cells.; A fire-retardant casing, which conforms to rigorous safety standards, encloses the entire battery.; Barrier walls isolate cells from the Printed Circuit Assembly (PCA), presenting a liquid and thermal barrier.; The PCA has a conformal coating to protect circuitry from potential shorts.; Internal connections are designed to prevent pinching and potential short circuits.
  • Genuine HP Batteries: Tested with all compatible HP notebook PCs so HP can deliver the highest quality products, services, and solutions to your home
  • HP Pavilion: dm4-1000, dm4-2000, dm4-3000, dv7-4000, dv7-6000, dv6-3000, dv6-6000, dv5-2000, dv4-4000, dv3-4000; HP: G42, G62, G72; ENVY: 17-100, 17-200; Compaq Presario: CQ32, CQ42, CQ43, CQ62, CQ72


  • 1.05 lb
  • 8.07 x 2.09 x 3.81 in

What's in the box

  • Battery; documentation
  • Three-year, worldwide parts-and-labor limited warranty; 24x7 HP technical phone support during warranty period

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Customer ratings and reviews for HP MU09 Long Life Notebook Battery

Rated 2 out of 5 by not worth the money battery life is supposed to be 8 hours or more mine don't last 4 will be calling to send it back. very unhappy February 9, 2012
Rated 5 out of 5 by 9-Cell Battery What a difference the 9-cell battery makes! I'm just sorry that I didn't make this purchase sooner. Possibly HP could offer this as an option on the initial purchase of a laptop? February 7, 2012
Rated 4 out of 5 by More cells good? Bought a dv6t with i7-2670 for my son, and following the "common knowledge", got a 9-cell to go with the standard 6-cell. Installed the 9-cell, and got about 4-1/2 hours out of it, installing software and "testing". My Toshi, which I liked very much, had a 12-cell, but it had an i7-740 processor, and would only last about 2 to 2-1/2 hours. So this was a definite upgrade. And so I bought a nearly identical dv6t for me. Then I "tested" the 6-cell, and it ran just under 4 hours, still a significant increase in running time without having to plug in. I ran Office 2010 Home & Business, Adobe Photoshop CS5, Norton 360, and lots of online researching (my hobby in retirement). So yes, I think it is a good investment to get the 9-cell, and I'll keep the 6 as a backup. Don't know if a 12-cell would make a difference to the dv6t (if one were offered), but I prefer the smaller bump (raises the typing surface just enough to minimize wrist angle) on the 9 to the 12's larger one (minor quibble). I like the dv6t so far, and the 2nd Gen Intel processor, and it's nice to be able to go longer between charges when I travel. I did buy the car charger, so that's not a problem, but the longer time between charges is still one less hassle of a laptop. January 21, 2012
Rated 5 out of 5 by Finally a long lasting battery I can finally run a laptop like it should be, that is, on battery power. I get about 4 hrs worth. The bump that the 9-cell battery has under the computer is not an issue. The 3 year warranty is also great. Very satisfied. January 13, 2012
Rated 5 out of 5 by HP 9-cell Extended Life Battery MU09 HP advertises that this products gives approx. 8 hours of battery use. I usually get a little longer than that and I have a high-end laptop with heavy graphics. I am a Web design/developer. I HIGHLY recommend this battery - I have TWO of them!! December 31, 2011
Rated 5 out of 5 by Best Battery EVER After my initial laptop battery died, I had to get a new one. This 9-cell battery could last forever. I love it!. A+ December 27, 2011

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Owner support

Warranty information

This product is covered by the standard HP warranty

Support information

Support for this product is provided by HP Customer Care

Returns & exchange information

The HP Home & Home Office Store will accept returns or exchanges for this product up to 21 days after delivery

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